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| Content Provider | IET Digital Library |
|---|---|
| Author | Moosazadeh, Mahdi |
| Abstract | A new technique for lowering the sidelobe level (SLL) of the microwave and millimetre-wave antipodal Vivaldi antenna (AVA) has been presented in this study. The technique is based on introducing tapered-shape Teflon surrounding AVA to couple energy propagated from the antenna and produce stronger radiation in the end-fire direction and as a result, it offers wideband low SLL. Some features of the presented antenna with the utilised new technique are summarised as follows: high gain in wide bandwidth corrected tilt of beam on E-plane in wide bandwidth and low cross-polarisation level. The presented antenna is fabricated and the magnitude of the reflection coefficient of the fabricated antenna is tested, which is from 3.2–40 GHz with S 11 < −10 dB. It exhibits an average of SLL < −10 dB in E-plane and SLL < −18 dB in H-plane at a wideband of 3.2–40 GHz. Moreover, the lowest E-plane's SLL of −20 dB is achieved over the frequency band of 7–7.5 GHz. The proposed antenna has a small size of 43 (width) × 108 (length) mm2. The proposed antenna with the mentioned features becomes an attractive candidate for imaging applications. |
| Starting Page | 474 |
| Ending Page | 478 |
| Page Count | 5 |
| ISSN | 17518725 |
| Volume Number | 14 |
| e-ISSN | 17518733 |
| Issue Number | Issue 6, May (2020) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-map/14/6 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-map.2019.0836 |
| Journal | IET Microwaves, Antennas & Propagation |
| Publisher Date | 2020-01-29 |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | Antenna Array Antenna Radiation Pattern Broadband Antenna Cross-polarisation Level Electromagnetic Wave Polarisation Electromagnetic Wave Reflection End-fire Direction Frequency 3.2 GHz to 40.0 GHz Imaging Application Microwave Antenna Array Microwave Antipodal Vivaldi Antenna Microwave AVA Microwave Imaging Microwave Measurement Technique Millimetre Wave Antenna Array Millimetre Wave Imaging Millimetre-wave Antipodal Vivaldi Antenna Reflection Coefficient Sidelobe Level Reduction Tapered-shape Teflon Vivaldi Antenna Wideband Low SLL |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electrical and Electronic Engineering |
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